Temperature-modulated acetone monitoring using Al2O3-coated evanescent wave fiber optic sensors

IF 2.5 3区 物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2024-10-24 DOI:10.1016/j.photonics.2024.101322
P. Manivannan, Zachariah C. Alex
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Abstract

This paper presents an experimental study of a fiber-optic-based acetone sensor and its temperature effects for use as a breath analyzer to detect acetone in exhaled breath. The study employs fiber optic evanescent wave-based acetone sensing, utilizing sputter coated Aluminium Oxide (Al2O3)-coated probes fabricated via clad modification technique. The optical fibers were coated with Al2O3 to achieve thicknesses of 247.03 nm, 334.05 nm, and 468.75 nm. The sensor probes were characterized using, Field Emission Scanning Electron Microscopy (FESEM), Energy Dispersive Spectroscopy (EDS), X-ray Diffraction (XRD), Ultraviolet-Visible (UV-Vis) Spectroscopy, and Spectroscopic Ellipsometry for uniformity, elemental, optical constants, and thickness of the Al2O3. The spectral responses of the probes were analyzed for acetone concentrations ranging from 0 to 100 ppm, with temperature modulation from room temperature to 100 °C. The probe with a ∼334 nm thick Al2O3 coating exhibited the highest response, reaching 6.2 % at 100 °C in 100 ppm acetone. Linear regression revealed that the ∼334 nm coated probe had the highest sensitivity at 5.98 counts/ppm. The sensor showed response and recovery times of approximately 12 and 17 seconds, respectively. This study underscores the stability and repeatability of temperature-modulated Al2O3-coated fiber optic sensors for selective acetone detection in various non-invasive applications.
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使用 Al2O3 涂层蒸发波光纤传感器进行温度调制丙酮监测
本文介绍了一种基于光纤的丙酮传感器及其温度效应的实验研究,该传感器可用作呼气分析仪,检测呼气中的丙酮。该研究采用基于光纤蒸发波的丙酮传感技术,利用通过包覆改性技术制造的溅射氧化铝(Al2O3)涂层探头。光纤上的 Al2O3 涂层厚度分别为 247.03 nm、334.05 nm 和 468.75 nm。使用场发射扫描电子显微镜 (FESEM)、能量色散光谱仪 (EDS)、X 射线衍射 (XRD)、紫外-可见 (UV-Vis) 光谱仪和光谱椭偏仪对传感器探针进行了表征,以确定 Al2O3 的均匀性、元素、光学常数和厚度。探针的光谱响应在丙酮浓度为 0 至 100 ppm 时进行分析,温度调节范围为室温至 100 °C。镀有 ∼334 nm 厚 Al2O3 涂层的探针响应最高,在 100 °C、100 ppm 丙酮浓度条件下达到 6.2%。线性回归显示,镀有 ∼334 nm 涂层的探头灵敏度最高,达到 5.98 计数/ppm。传感器的响应和恢复时间分别约为 12 秒和 17 秒。这项研究强调了温度调制 Al2O3 涂层光纤传感器在各种非侵入式应用中选择性检测丙酮的稳定性和可重复性。
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来源期刊
CiteScore
5.00
自引率
3.70%
发文量
77
审稿时长
62 days
期刊介绍: This journal establishes a dedicated channel for physicists, material scientists, chemists, engineers and computer scientists who are interested in photonics and nanostructures, and especially in research related to photonic crystals, photonic band gaps and metamaterials. The Journal sheds light on the latest developments in this growing field of science that will see the emergence of faster telecommunications and ultimately computers that use light instead of electrons to connect components.
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